Common problem?

qcfarmer · May 27, 2011

Back in January I installed an aux fuel tank that filled my oem tank via gravity feed. I immediately noticed my oem fuel tank leaked around the fill tube, where the plastic nipple is. I don't know how long it was broken for because it is impossible to fill the oem tank to the very top. With the aux tank and gravity feed setup, it was obviously leaking. I went and replaced the oem tank with a new tank from ford. The setup has worked perfectly until yesterday when the oem tank started leaking from the plastic nipple again. Are these tanks known for this and is there something I can do so I don't end up having to replace tanks every 5 months. Thank you

BFT · Jun 3, 2011

How bad does it leak? Mine shows some leaking but never a drop on the ground

K_Hood · Jun 14, 2011

Interesting, I am interested as well because I would like to consider an aux fuel tank in the future. Do you have any pics of your setup?

Sorry that I don't have a solution, but hopefully the bump might help you a little bit.

qcfarmer · Jun 26, 2011

Haven't had time to look at it. We've been busy with field work. It leaks enough to drip on the ground and you can see it running down the side of the fuel tank.

BFT · Jul 3, 2011

could it be a bad filler neck to the tank?

qcfarmer · Aug 1, 2011

*update* Turns out the hose connected to the roll-over valve has a breather on it and when my aux tank is full, it makes enough pressure to leak from there. I don't know if I can just eliminate the breather or maybe just relocate it to a higher spot? What woul happen if I just plugged the roll-over valve hose before the breather?

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White_monster · Aug 3, 2011

Don't plug it. Tank needs to vent. Just relocate it higher up.

buschpoweredstroker · Aug 3, 2011

won't he have to locate it at least as high as the level in his aux. tank?

White_monster · Aug 3, 2011

buschpoweredstroker · Aug 3, 2011

could just put a valve in... fill it when it gets low, we had a truck that had a pump... but only because it was too low to gravity feed(obs under the back tank) put the pump on an in cab switch and it worked pretty well.

qcfarmer · Aug 4, 2011

I ended up putting a hose between the roll-over valve and the breather on aux tank and putting factory breather on that hose. The breather now sits about an inch higher than aux tank which should allow both tanks to breath

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